Which option allows managers to view only their employee's performance metrics?

The correct choice allows managers to view only their employee's performance metrics as it specifically limits the scope of visibility to the manager's direct reports. This means managers are provided with data that pertains only to the employees they supervise, ensuring confidentiality and focus on their team's performance without the distraction of metrics from other employees in the organization.

This approach is essential for performance management as it allows managers to concentrate on fostering the development and evaluation of their subordinates while maintaining sensitive information about other employees. It fosters a tailored and relevant performance review process that can motivate and build effective relationships between managers and their teams.

Other options do not provide the same level of control over visibility. Full access permission typically allows managers unrestricted access to all employees' performance metrics, which is contrary to the intended focus on a specific team. Shared view permission implies a more broad sharing of information that can include many employees beyond just subordinates. Custom employee relationship settings might allow some tailored visibility but do not inherently guarantee the limitation to just their direct reports as clearly as the user self and subordinates constraint.